A fully sealed ring main unit based on magnetron environmental protection gas insulation

Abstract

The present invention relates to the technical field of ring main units, and in particular to a fully enclosed ring main unit based on magnetically controlled environmentally friendly gas insulation. It includes a housing, a circuit breaker is installed inside the housing, power components are arranged inside the housing, a plurality of ring main unit doors are hinged to the housing, an air box is fixedly connected to the housing, a gas storage chamber is arranged inside the housing, a vacuum interrupter is arranged inside the air box, a first magnetic ring is fixedly connected to the housing, the first magnetic ring is electrically connected to the circuit breaker, a dry insulating gas is filled in the gas storage chamber, and the secondary circuit of the power components is located inside the gas storage chamber. By setting the gas storage chamber, placing the secondary circuit inside the gas storage chamber, and injecting the dry insulating gas into the gas storage chamber, the present invention protects the secondary circuit, preventing water vapor in the external environment from entering the gas storage chamber and causing corrosion or short circuit of the secondary circuit due to the influence of condensation, thereby causing a power outage accident.

Description

Technical Field

[0001] The present invention relates to the technical field of ring main units, and in particular to a fully sealed ring main unit based on magnetically controlled environmentally friendly gas insulation. Background Art

[0002] With the continuous development of Internet of Things technology, sensor technology and signal processing technology, and the increasing requirements of the power distribution industry for power equipment, environmental protection and intelligence have become the development trend of the current power distribution system. This requires the ring main unit to be upgraded. Since dry air or nitrogen is a commonly used environmentally friendly insulating gas, the research and application of alternative technologies for the greenhouse gas SF6 are the inevitable direction for current 12 kV ring main unit products if the ring main unit is to be more environmentally friendly.

[0003] The primary main circuit of the existing ring main unit is sealed inside the gas tank and is not affected by the external environment, while the secondary circuit is located at the lower part or the rear part of the ring main unit and is extremely vulnerable to the external environment, which leads to the secondary circuit being easily affected by condensation and causing corrosion or short-circuit phenomena, thus resulting in power outages. Summary of the Invention

[0004] In order to overcome the disadvantages that the secondary circuit is easily affected by condensation and causes corrosion or short-circuit phenomena, thus resulting in power outages, the present invention provides a fully sealed ring main unit based on magnetically controlled environmentally friendly gas insulation.

[0005] The technical solution is as follows: A fully sealed ring main unit based on magnetically controlled environmentally friendly gas insulation, comprising a housing, a circuit breaker is installed inside the housing, power components are arranged inside the housing, a plurality of ring main unit doors are hinged to the housing, an air tank is fixedly connected to the housing, a gas storage chamber is arranged inside the housing, a vacuum interrupter is arranged inside the air tank, a first magnetic ring located inside the gas storage chamber is fixedly connected to the housing, the first magnetic ring is electrically connected to the circuit breaker, the gas storage chamber is filled with dry insulating gas, the secondary circuit of the power components is located inside the gas storage chamber, a sliding rod located inside the vacuum interrupter is slidably connected to the housing, a blocking block is fixedly connected to the sliding rod, an elastic member is fixedly connected between the blocking block and the vacuum interrupter, the first magnetic ring and the blocking block are magnetically coupled, through holes are arranged on both the housing and the air tank, and the two through holes are used to communicate the gas storage chamber with the vacuum interrupter, and both of the two through holes are in sealing cooperation with the blocking block.

[0006] Beneficially, a sliding plate that is in sealed cooperation with the air box is slidably connected inside the vacuum interrupter. An elastic member is fixedly connected between the sliding plate and the air box. The air box is fixedly connected with a heat insulation jacket. A piston is hermetically and slidably connected inside the heat insulation jacket. The piston is made of heat insulation material. A thermal sensitive block is arranged on one side of the heat insulation jacket close to the air box. A heat conducting rod that passes through the thermal sensitive block is fixedly connected to one side of the piston close to the air box. A wedge-shaped block is fixedly connected to the heat conducting rod. An elastic member is fixedly connected between the wedge-shaped block and the air box. The wedge-shaped block is made of heat conducting material. The wedge-shaped block is in limit cooperation with the sliding plate. A pressure relief chamber is arranged between the sliding plate and the air box. An air bag that is communicated with the pressure relief chamber is fixedly connected to the outer shell. The air bag is located at the hinge of the ring network cabinet door on the outer shell.

[0007] Beneficially, the elastic force of the elastic member on the sliding plate is less than the elastic force of the elastic member on the plugging block, so that when the sliding plate and the plugging block are both stressed, the elastic member of the sliding plate is preferentially squeezed and contracted, and the elastic member of the plugging block is prevented from being stretched.

[0008] Beneficially, a humidity sensor is installed on the upper side of the outer shell. The air box is fixedly connected with a second magnetic ring that is electrically connected to the humidity sensor. An iron block is fixedly connected to one side of the piston close to the second magnetic ring. The second magnetic ring and the iron block are magnetically coupled. The air box is fixedly connected with a pneumatic telescopic rod that is communicated with the heat insulation jacket.

[0009] Beneficially, a vacuum three-position switch is arranged inside the vacuum interrupter. An epoxy resin layer is arranged on the inner side wall of the air box. The outside of the vacuum three-position switch is fixedly sealed with epoxy resin.

[0010] Beneficially, a magnetic control mechanism for controlling the vacuum three-position switch is arranged inside the vacuum interrupter. The closing current of the magnetic control mechanism is 15A - 20A, the opening current is less than 1A, the opening time of the magnetic control mechanism is less than 6ms, the closing time is less than 10ms, and the discreteness of closing and opening is less than ±0.2ms.

[0011] Beneficially, it further includes a water cooler. The water cooler is fixedly connected to the outer shell. The water cooler is fixedly connected and communicated with symmetrically distributed water cooling pipes. The water cooling pipes are embedded in the inner wall of the outer shell. Symmetrically distributed first cooling plates that are respectively communicated with adjacent water cooling pipes are embedded in the inner wall of the outer shell. A return pipe that is communicated with the water cooler is fixedly connected and communicated with the first cooling plates. The water cooler is communicated with a second cooling plate embedded in the inner wall of the outer shell through a conduit. The second cooling plate is fixedly connected and communicated with a first pipe. The water cooler is fixedly connected and communicated with a second pipe. The first pipe is communicated with the second pipe.

[0012] Advantageously, the reflux pipeline is provided with a frustum-shaped channel, a limiting plate is slidably connected in the frustum-shaped channel, a sliding rod fixedly connected to the limiting plate and slidably connected to an adjacent frustum-shaped channel is provided, and an elastic member is fixedly connected between the sliding rod and the frustum-shaped channel.

[0013] Advantageously, a conduit of the water cooler is fixedly connected and communicated with a branch pipeline passing through the outer shell. The water cooler is located in the gas storage chamber. The branch pipeline is communicated with the first cooling plate. A rotating plate is rotatably connected in the branch pipeline. A leaf fan is hermetically rotatably connected at a position close to the rotating plate in the branch pipeline. The leaf fan is fixedly connected with an elastic piece through a rotating shaft. The outer shell is fixedly connected with a limiting rod which is in extrusion fit with the elastic piece. A sounding shell which is in extrusion fit with the elastic piece is fixedly connected at a position of the outer shell close to the limiting rod.

[0014] Advantageously, it further includes a pressure relief channel baffle. The gas box is provided with a pressure relief channel. The pressure relief channel baffle is detachably connected to a position of the gas box close to the pressure relief channel. A support frame is fixedly connected to one side of the gas box close to the pressure relief channel baffle. A pressing plate which is in extrusion fit with the pressure relief channel baffle is slidably connected to the support frame. A first hydraulic telescopic rod is fixedly connected to the support frame. The telescopic end of the first hydraulic telescopic rod is fixedly connected to the pressing plate. The outer shell is fixedly connected with a second hydraulic telescopic rod communicated with the first hydraulic telescopic rod. Hydraulic oil is filled in both the first hydraulic telescopic rod and the second hydraulic telescopic rod. A rack is fixedly connected to the telescopic end of the second hydraulic telescopic rod. A gear is hermetically rotatably connected between the first pipeline and the second pipeline. The gear is meshed with the rack. The gear is provided with a first hole communicated with the first pipeline. The second pipeline is provided with a second hole communicated and matched with the first hole.

[0015] The beneficial effects of the present invention are as follows: 1. By providing a gas storage chamber, placing the secondary circuit in the gas storage chamber, and filling the gas storage chamber with dry insulating gas, the secondary circuit is protected to prevent water vapor in the external environment from entering the gas storage chamber, resulting in corrosion or short circuit of the secondary circuit due to the influence of condensation, thus causing a power outage accident;

[0016] 2. The blocking block is adsorbed by the first magnetic ring. When the arc voltage generated in the vacuum arc extinguishing chamber is too large, the blocking block moves and the gas storage chamber is communicated with the vacuum arc extinguishing chamber. The dry insulating gas in the gas storage chamber enters the vacuum arc extinguishing chamber and processes the arc, preventing the arc voltage from being too large and reducing the arc extinguishing efficiency of the vacuum arc extinguishing chamber, thus affecting the operation of the power components in the outer shell;

[0017] 3. The elastic member of the sliding plate drives it to move leftward, gradually increasing the space in the vacuum interrupter, preventing the dry insulating gas from heating up and expanding, which may cause an increase in the air pressure in the vacuum interrupter and damage to the electronic components inside due to the influence of the air pressure.

[0018] 4. The flow of the coolant causes the fan blade to drive the elastic piece to rotate through the rotating plate, and the elastic piece strikes the sound - emitting housing, causing the sound - emitting housing to emit a sound to intimidate animals such as insects, so as to prevent insects and other animals from inhabiting inside due to the suitable temperature inside the housing, thereby preventing animals from damaging the housing and entering it, causing the parts inside the housing to be bitten and affecting the normal operation of the power components inside the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three - dimensional structure schematic diagram of the present invention;

[0020] Figure 2 is a three - dimensional structure sectional view of the housing of the present invention;

[0021] Figure 3 is a three - dimensional structure schematic diagram of the sliding rod and the plugging block of the present invention;

[0022] Figure 4 is a three - dimensional structure schematic diagram of the sliding plate of the present invention;

[0023] Figure 5 is a three - dimensional structure schematic diagram of the heat - insulating sleeve and the piston of the present invention;

[0024] Figure 6 is a three - dimensional structure sectional view of the heat - insulating sleeve of the present invention;

[0025] Figure 7 is a three - dimensional structure schematic diagram of the first cooling plate and the second cooling plate of the present invention;

[0026] Figure 8 is a three - dimensional structure schematic diagram of the limiting plate of the present invention;

[0027] Figure 9 is a three - dimensional structure schematic diagram of the branch pipe of the present invention;

[0028] Figure 10 is a three - dimensional structure sectional view of the branch pipe of the present invention;

[0029] Figure 11 is a three - dimensional structure schematic diagram of the support frame of the present invention;

[0030] Figure 12 is a three - dimensional structure schematic diagram of the rack and the gear of the present invention.

[0031] Reference signs in the drawings: 1: housing, 101: gas box, 102: gas storage chamber, 103: vacuum interrupter, 104: first magnetic ring, 105: sliding rod, 106: plugging block, 2: sliding plate, 201: heat insulation jacket, 202: piston, 203: thermal sensitive block, 204: wedge block, 205: pressure relief chamber, 206: airbag, 4: humidity sensor, 401: second magnetic ring, 402: iron block, 403: pneumatic telescopic rod, 7: water cooler, 701: water cooling pipe, 702: first cooling plate, 703: return pipe, 704: second cooling plate, 705: first pipe, 706: second pipe, 707: limiting plate, 9: branch pipe, 901: rotating plate, 902: fan blade, 903: elastic piece, 904: limiting rod, 905: sound generating housing, 10: pressure relief channel baffle, 1001: support frame, 1002: pressing plate, 1003: first hydraulic telescopic rod, 1004: second hydraulic telescopic rod, 1005: rack, 1006: gear, 1007: first hole, 1008: second hole. Detailed implementation manners

[0032] The implementation manners of the present invention will be described below with reference to the drawings.

[0033] The primary main circuit of the existing ring main unit is sealed inside the gas box and is not affected by the external environment. However, the secondary circuit is located at the lower part or the rear part of the ring main unit and is extremely vulnerable to the external environment, which results in the secondary circuit being easily affected by condensation and causing corrosion or short circuit, thus causing a power outage accident.

[0034] Embodiment 1: A fully sealed ring main unit based on magnetically controlled environmentally friendly gas insulation, as Figures 1 - 3As shown in the figure, it includes a housing 1. The housing 1 is provided with a control panel. A circuit breaker electrically connected to the control panel is installed inside the housing 1. Power components are arranged inside the housing 1. Among them, the control panel, the circuit breaker and the power components are not shown in the figure. A plurality of ring network cabinet doors are hinged to the housing 1. An air tank 101 is fixedly connected to the housing 1. A gas storage chamber 102 is arranged inside the housing 1. A vacuum interrupter 103 is arranged inside the air tank 101. A first magnetic ring 104 located inside the gas storage chamber 102 is fixedly connected to the housing 1. The first magnetic ring 104 is electrically connected to the control panel and the circuit breaker. The first magnetic ring 104 is an electromagnet, which starts and has magnetic force when powered on. When the circuit breaker is powered off and starts due to a high-voltage arc generated inside the housing 1, the circuit breaker issues an instruction and controls the first magnetic ring 104 to be powered on through the control panel. The gas storage chamber 102 is filled with a dry insulating gas. The secondary circuit of the power component is located inside the gas storage chamber 102. A sliding rod 105 located inside the vacuum interrupter 103 is slidably connected to the housing 1. A frustum-shaped plugging block 106 is fixedly connected to the sliding rod 105, and the minimum diameter of the plugging block 106 is on the upper side. The inside of the vacuum interrupter 103 is in a vacuum state, so that the plugging block 106 is adsorbed and hermetically connected to the air tank 101. An elastic member is fixedly connected between the plugging block 106 and the vacuum interrupter 103. The elastic member is a tension spring, which is used to tighten the plugging block 106 and make it hermetically connected to the air tank 101. The first magnetic ring 104 and the plugging block 106 are magnetically coupled. Through holes are provided on both the housing 1 and the air tank 101. The two through holes are used to communicate the gas storage chamber 102 with the vacuum interrupter 103, and both through holes are in plugging cooperation with the plugging block 106. A vacuum three-position switch is arranged inside the vacuum interrupter 103. An epoxy resin layer is provided on the inner side wall of the air tank 101. The outside of the vacuum three-position switch is fixedly sealed with epoxy resin to prevent the influence of environmental conditions (such as condensation, dust, salt spray and strong electromagnetic interference) on the vacuum three-position switch, so that it can be applied to places with harsh environments. A magnetic control mechanism for controlling the vacuum three-position switch is arranged inside the vacuum interrupter 103. The closing current of the magnetic control mechanism is 15A - 20A, the opening current is less than 1A, the opening time of the magnetic control mechanism is less than 6ms, the closing time is less than 10ms, and the discreteness of closing and opening is less than ±0.2ms, so as to facilitate precise control and better match the application scenarios of smart grids.

[0035] As Figures 4 - 6As shown, a sliding plate 2 that is hermetically fitted with the air box 101 is slidably connected inside the vacuum interrupter 103. An elastic member is fixedly connected between the sliding plate 2 and the air box 101. The elastic member is a tension spring. The air box 101 is fixedly connected with a heat insulation housing 201. A piston 202 is hermetically and slidably connected inside the heat insulation housing 201. The piston 202 is made of heat insulation material. A thermosensitive block 203 is arranged at the lower part inside the heat insulation housing 201. A heat conduction rod passing through the thermosensitive block 203 is fixedly connected to the lower side of the piston 202. The heat insulation housing 201 and the piston 202 are used to isolate the influence of external heat on the thermosensitive block 203, so that the thermosensitive block 203 only detects the heat inside the air box 101 through the heat conduction rod and the wedge-shaped block 204. The heat conduction rod is fixedly connected with a wedge-shaped block 204 with a guiding inclined surface. An elastic member is fixedly connected between the wedge-shaped block 204 and the air box 101. The elastic member is a compression spring. The wedge-shaped block 204 is made of heat conduction material. The wedge-shaped block 204 is in limit fit with the sliding plate 2. After the wedge-shaped block 204 moves upward, the sliding plate 2 slides along the guiding inclined surface of the wedge-shaped block 204. A pressure relief chamber 205 is arranged between the sliding plate 2 and the air box 101. An air bag 206 communicated with the pressure relief chamber 205 is fixedly connected to the housing 1. The air bag 206 is located at the hinge of the ring network cabinet door on the housing 1 and is used to seal the hinge of the ring network cabinet door on the housing 1. The elastic force of the elastic member on the sliding plate 2 is less than the elastic force of the elastic member on the plugging block 106, so that when the dry insulating gas entering the vacuum interrupter 103 is heated and expands, and the sliding plate 2 and the plugging block 106 are simultaneously squeezed by the expanding gas, the elastic member of the sliding plate 2 is preferentially squeezed and contracted, and the elastic member of the plugging block 106 is prevented from being stretched.

[0036] As Figure 5 with Figure 6 shown, a humidity sensor 4 electrically connected to the control panel is installed on the upper side of the housing 1. The air box 101 is fixedly connected with a second magnetic ring 401 electrically connected to the humidity sensor 4. The second magnetic ring 401 is an electromagnet and has a magnetic force after being energized. An iron block 402 is fixedly connected to the upper side of the piston 202. The second magnetic ring 401 and the iron block 402 are magnetically attracted and matched. The air box 101 is fixedly connected with a pneumatic telescopic rod 403 communicated with the heat insulation housing 201 through a conduit, which is used to guide and collect the gas in the upper part inside the heat insulation housing 201 when the piston 202 moves up and down.

[0037] When an operator needs to use this device for power distribution, the operator installs this device at the position where power distribution operation needs to be carried out, and then turns on the vacuum three-position switch through the magnetic control mechanism, so that the power components inside the housing 1 start to work. During the process of the power components inside the housing 1 working, through the epoxy resin layer inside the vacuum interrupter 103 and the epoxy resin solid-sealing layer of the vacuum three-position switch, the influence of environmental conditions (such as condensation, dust, salt spray and strong electromagnetic interference) on the power components is eliminated to adapt to the harsh external environment.

[0038] During the operation of the power components inside the housing 1, if the arc voltage generated inside the vacuum interrupter 103 is too high, resulting in the arc extinguishing ability of the vacuum interrupter 103 being insufficient to completely remove the high-voltage arc generated inside it, the circuit breaker inside the housing 1 is activated, causing the power components inside the housing 1 to temporarily stop working. At the same time, the circuit breaker inside the housing 1 transmits an electrical signal to the control panel, and the control panel turns on the first magnetic ring 104, making the first magnetic ring 104 energized and have magnetic force. The first magnetic ring 104 adsorbs the plugging block 106 through magnetic force, the plugging block 106 moves downward and drives the sliding rod 105 to move downward. The elastic member of the plugging block 106 is gradually stretched, and the plugging of the through hole of the housing 1 and the through hole of the air box 101 by the plugging block 106 is released, so that the gas storage chamber 102 is communicated with the vacuum interrupter 103. The dry insulating gas in the gas storage chamber 102 enters the vacuum interrupter 103 to process the arc with a higher voltage. Then the circuit breaker inside the housing 1 resets, and the power components inside the housing 1 start working again. The first magnetic ring 104 is de-energized and loses its magnetic force. The first magnetic ring 104 adsorbs the plugging block 106, the elastic member of the plugging block 106 rebounds and drives it to reset, the plugging block 106 drives the sliding rod 105 to reset, and the plugging block 106 plugs the through hole of the housing 1 and the through hole of the air box 101 again.

[0039] When the external environmental temperature rises and causes the dry insulating gas entering the vacuum interrupter 103 to expand, the temperature inside the vacuum interrupter 103 is conducted to the thermosensitive block 203 through the wedge block 204 and the heat conducting rod. The initial expansion temperature of the thermosensitive block 203 is approximately the same as the initial expansion temperature of the dry insulating gas. After the dry insulating gas starts to expand, the thermosensitive block 203 starts to expand synchronously. The thermosensitive block 203 expands and squeezes the piston 202 to move upward. The piston 202 drives the wedge block 204 to move upward through the heat conducting rod. The elastic member of the wedge block 204 is gradually compressed. The elastic member of the sliding plate 2 drives it to move leftward (from Figure 1 a certain perspective), and the space inside the vacuum interrupter 103 gradually increases, avoiding the increase in air pressure inside the vacuum interrupter 103 caused by the expansion of the dry insulating gas due to temperature rise, which may damage the electronic components inside the vacuum interrupter 103 due to air pressure. At the same time, the sliding plate 2 squeezes the gas in the pressure relief chamber 205 into the airbag 206. The airbag 206 expands and covers the hinge of the front side ring network cabinet door of the housing 1 to seal the hinge of the ring network cabinet door, thereby blocking the entry of external light and dust, and further reducing the impact of external high temperature on the power components inside the housing 1. When the external environmental temperature drops, the thermosensitive block 203 contracts and resets. The elastic member of the wedge block 204 drives it to reset. The wedge block 204 squeezes the sliding plate 2 to reset, and the gas in the airbag 206 is pumped back into the pressure relief chamber 205.

[0040] When the external environment is rainy, the humidity sensor 4 senses the increase in external humidity and sends a command to the control panel. The control panel controls the second magnetic ring 401 to be energized and have magnetism. The second magnetic ring 401 adsorbs the iron block 402 through magnetism. The iron block 402 moves upward and drives the piston 202 to move upward. The piston 202 drives the wedge block 204 to move upward through the heat conduction rod. The elastic member of the wedge block 204 is compressed, so that the wedge block 204 loses contact with the sliding plate 2. The elastic member of the sliding plate 2 contracts and squeezes the gas in the pressure relief chamber 205 into the airbag 206 through the above steps. The airbag 206 expands and covers the hinge of the front side ring network cabinet door of the housing 1, preventing external rainwater from entering its interior through the hinge of the front side ring network cabinet door of the housing 1, causing the power components in the housing 1 to be short-circuited by the rainwater, and then affecting the power distribution of the ring network cabinet. After the external environmental humidity returns to normal, the humidity sensor 4 senses the change in external humidity and sends a command to the control panel. The control panel controls the second magnetic ring 401 to be de-energized and lose magnetism. The iron block 402 is no longer adsorbed by the second magnetic ring 401. The elastic member of the wedge block 204 drives it to reset. The wedge block 204 squeezes the sliding plate 2 to reset. The gas in the airbag 206 is pumped back into the pressure relief chamber 205.

[0041] When the operator needs to stop using this device, the operator turns off the power components of this device through the control panel, and then extracts the dry insulating gas in the vacuum interrupter 103 to make the vacuum interrupter 103 return to the vacuum state.

[0042] During the use of the existing ring network cabinet, due to the heat preservation performance of the ring network cabinet and the operation of the cooling system, the temperature of the ring network cabinet changes less compared with the external environment, making it more suitable for the survival of animals such as insects. Therefore, animals often damage the housing of the ring network cabinet and enter it, causing the parts and circuits in the ring network cabinet to be bitten and damaged, and then affecting the normal operation of the ring network cabinet.

[0043] Example 2: On the basis of Example 1, as Figure 2 And Figures 7 - 9As shown, it also includes a water cooler 7 electrically connected to the control panel, the water cooler 7 is fixed to the shell 1, the water cooler 7 is fixedly connected and connected to water cooling pipes 701 distributed symmetrically in front and back, the water cooling pipes 701 are embedded in the inner wall of the shell 1, the inner wall of the shell 1 is embedded with first cooling plates 702 distributed symmetrically in front and back and respectively connected to adjacent water cooling pipes 701, the first cooling plate 702 is fixedly connected and connected to a return pipe 703 connected to the water cooler 7, the water cooler 7 is connected to a second cooling plate 704 embedded in the inner wall of the shell 1 through a conduit, the second cooling plate 704 is fixedly connected and connected to a first pipe 705, the water cooler 7 is fixedly connected and connected to a second pipe 706, the first The pipe 705 is connected with the second pipe 706, and the return pipe 703 is provided with a truncated cone-shaped channel, in which a limiting plate 707 is slidably connected, and there is a gap between the limiting plate 707 and the adjacent truncated cone-shaped channel, and a sliding rod slidably connected with the adjacent truncated cone-shaped channel is fixedly connected to the limiting plate 707, and an elastic member is fixedly connected between the sliding rod and the truncated cone-shaped channel, wherein the elastic member is a tension spring. If the truncated cone-shaped channel is not provided on the return pipe 703, the flow rate and flow velocity of the coolant in the water-cooling pipe 701, the return pipe 703, the first pipe 705 and the second pipe 706 are the same. In this embodiment, the first pipe 705 is directly connected with the second pipe 706.

[0044] like Figure 9 and Figure 10 As shown, the conduit of the water cooler 7 is fixedly connected and communicated with a branch pipe 9 passing through the shell 1, the water cooler 7 is located in the air storage chamber 102, the branch pipe 9 is communicated with the first cooling plate 702, and a rotating plate 901 is rotatably connected in the branch pipe 9. In the process of the coolant flowing from the back to the front in the branch pipe 9, the coolant squeezes the rotating plate 901, and the rotating plate 901 is used to block the coolant so that the coolant is always in contact with the left half of the blade fan 902. The position near the rotating plate 901 in the branch pipe 9 is sealed and rotatably connected with the blade fan 902, the blade 902 is fixedly connected to a spring piece 903 through a rotating shaft, and a protrusion is set at the position of the spring piece 903 away from the rotating shaft of the blade 902, and the shell 1 is fixedly connected to a limiting rod 904 that is squeezed and matched with the spring piece 903, so that after the spring piece 903 rotates to contact with the limiting rod 904, the limiting rod 904 squeezes the spring piece 903 to bend and deform, and the shell 1 is fixedly connected to a sound-generating shell 905 that is squeezed and matched with the spring piece 903 near the limiting rod 904, and when the spring piece 903 rebounds after deformation, it knocks the sound-generating shell 905.

[0045] When the operator needs to cool down the device, the operator turns on the water cooler 7 through the control panel. A part of the coolant in the water cooler 7 flows into the adjacent first cooling plates 702 through two water cooling pipes 701 respectively, and another part of the coolant enters the second cooling plate 704 through the conduit of the water cooler 7. The coolant in the first cooling plate 702 absorbs the heat inside the housing 1, and then the coolant carries the heat and returns to the water cooler 7 through the return pipe 703. Due to the blockage of the limiting plate 707, when the coolant flows through the return pipe 703, the coolant squeezes the limiting plate 707, causing the elastic member of the limiting plate 707 to compress. A gap is generated between the conical channel of the return pipe 703 and the adjacent limiting plate 707, and the coolant flows through the gap between the conical channel of the return pipe 703 and the adjacent limiting plate 707. The coolant in the first pipe 705 and the coolant in the second pipe 706 both flow normally, so that the amount and flow rate of the coolant flowing through the return pipe 703 are less than those of the first pipe 705. The cooling power of the second cooling plate 704 is greater than that of the two first cooling plates 702. The coolant in the second cooling plate 704 cools the dry insulating gas in the gas storage chamber 102, so that after the gas storage chamber 102 is communicated with the vacuum interrupter 103, a temperature difference is generated between the gas storage chamber 102 and the vacuum interrupter 103, and the dry insulating gas at a lower temperature quickly flows into the vacuum interrupter 103 at a higher temperature.

[0046] During the flow of the coolant, a part of the coolant flows into the branch pipe 9 through the conduit of the water cooler 7, and then flows into the second cooling plate 704 through the branch pipe 9. When the coolant flows through the branch pipe 9, the coolant drives the fan blade 902 to rotate. The fan blade 902 drives the elastic piece 903 to rotate through the rotating plate 901. When the elastic piece 903 rotates to contact and squeeze the limiting rod 904, the elastic piece 903 gradually deforms and bends. Then, along with the rotation of the elastic piece 903, the elastic piece 903 loses contact with the limiting rod 904 and knocks on the sound - emitting housing 905, causing the sound - emitting housing 905 to emit a sound to intimidate animals such as insects, so as to prevent animals from inhabiting in it due to the suitable temperature inside the housing 1, thereby preventing animals from damaging the housing 1 and entering it, causing the parts inside the housing 1 to be bitten and further affecting the normal operation of the electrical components inside the housing 1.

[0047] When the operator needs to stop cooling down the device, the operator can turn off the water cooler 7 through the control panel.

[0048] In the above - mentioned embodiment, the first pipe 705 is directly communicated with the second pipe 706, while in the following embodiment, the first pipe 705 and the second pipe 706 are communicated through the first hole 1007 located therebetween.

[0049] Embodiment 3: On the basis of Embodiment 2, asFigure 3 , Figure 11 and Figure 12 As shown, it further includes a pressure relief channel baffle 10. The gas box 101 is provided with a pressure relief channel. The pressure relief channel baffle 10 is detachably connected to the position of the gas box 101 close to the pressure relief channel. The form of the detachable connection of the pressure relief channel baffle 10 is a threaded connection. The four corners of the pressure relief channel baffle 10 are fixed by four bolts. The materials of the two upper bolts are metal, while the two lower bolts are nylon materials. Its operation mode is the same as the working principle of the pressure relief channel of the existing ring main unit, that is, when the pressure in the gas box 101 is too high, the nylon bolts of the pressure relief channel baffle 10 are pushed out, so that the gas in the gas box 101 is discharged. This will not be elaborated here. A support frame 1001 is fixedly connected to the rear side of the gas box 101. A pressing plate 1002 that is in pressing fit with the pressure relief channel baffle 10 is slidably connected to the support frame 1001. The support frame 1001 is fixedly connected with a first hydraulic telescopic rod 1003. The telescopic end of the first hydraulic telescopic rod 1003 is fixedly connected to the pressing plate 1002. The housing 1 is fixedly connected with a second hydraulic telescopic rod 1004 that is communicated with the first hydraulic telescopic rod 1003 through a conduit. Both the first hydraulic telescopic rod 1003 and the second hydraulic telescopic rod 1004 are filled with hydraulic oil. The telescopic end of the second hydraulic telescopic rod 1004 is fixedly connected with a rack 1005. A gear 1006 is jointly and sealingly rotatably connected between the first pipe 705 and the second pipe 706. The gear 1006 meshes with the rack 1005. The gear 1006 is provided with a first hole 1007 that is communicated with the first pipe 705. The second pipe 706 is provided with a second hole 1008 that is in communication and cooperation with the first hole 1007. The shapes of the first hole 1007 and the second hole 1008 are both semi-circular. After the rack 1005 moves downward to the limit position, the rack 1005 drives the gear 1006 to rotate 180°, so that the flow area between the first hole 1007 and the second hole 1008 reaches the maximum.

[0050] When the temperature in the air box 101 is too high, causing the gas inside to expand, if the pressure relief channel baffle 10 is pushed open due to the gas expansion, the pressure relief channel baffle 10 drives the extrusion plate 1002 to move backward. The extrusion plate 1002 drives the telescopic end of the first hydraulic telescopic rod 1003 to move backward. The telescopic end of the first hydraulic telescopic rod 1003 contracts and squeezes the hydraulic oil inside it into the second hydraulic telescopic rod 1004 through a conduit, causing the telescopic end of the second hydraulic telescopic rod 1004 to extend. The telescopic end of the second hydraulic telescopic rod 1004 drives the gear 1006 to rotate through the rack 1005. The gear 1006 drives the first hole 1007 on it to rotate, so that the flow area between the first hole 1007 and the second hole 1008 gradually increases, thereby increasing the coolant flow rate in the first pipe 705 and the second pipe 706. More coolant in the water cooler 7 enters the second cooling plate 704 through the conduit, and the coolant volume entering the two return pipes 703 correspondingly decreases. The liquid pressure on the limiting plate 707 decreases, and the gap between the limiting plate 707 and the adjacent frustum-shaped channel decreases, reducing the coolant volume in the two water coolers 7, the two first cooling plates 702, and the two return pipes 703. Thus, the cooling intensity of the second cooling plate 704 on the lower side of the air box 101 is increased, preventing damage to the internal power components in the air box 101 due to excessive temperature.

[0051] When the coolant flow rate in the second cooling plate 704 increases, the coolant flow rate in the branch pipe 9 correspondingly increases. The coolant in the branch pipe 9 drives the elastic piece 903 to rotate faster through the fan 902, and the frequency of the elastic piece 903 hitting the sound-generating housing 905 also increases, thereby warning the operator that the pressure relief channel baffle 10 is opened, so that the operator can discover and replace the pressure relief channel baffle 10 in time, preventing the external environment from affecting the power components in the air box 101 after the pressure relief channel baffle 10 is opened.

[0052] In summary, the above is only the preferred embodiment of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fully sealed ring main unit based on magnetron environmental protection gas insulation, comprising a housing (1). A circuit breaker is installed inside the housing (1). Power components are arranged inside the housing (1). The housing (1) is hinged with a plurality of ring main unit doors. The housing (1) is fixedly connected with an air tank (101). A gas storage chamber (102) is arranged inside the housing (1). A vacuum interrupter (103) is arranged inside the air tank (101). It is characterized in that, It further includes a first magnetic ring (104) located in the gas storage chamber (102). The first magnetic ring (104) is fixedly connected to the outer shell (1). The first magnetic ring (104) is electrically connected to the circuit breaker. The gas storage chamber (102) is filled with dry insulating gas. The secondary circuit of the power component is located in the gas storage chamber (102). A sliding rod (105) located in the vacuum arc extinguishing chamber (103) is slidably connected to the outer shell (1). A blocking block (106) is fixedly connected to the sliding rod (105). An elastic member is fixedly connected between the blocking block (106) and the vacuum arc extinguishing chamber (103). The first magnetic ring (104) and the blocking block (106) are magnetically coupled. Through holes are provided in both the outer shell (1) and the gas tank (101). The two through holes are used to communicate the gas storage chamber (102) with the vacuum arc extinguishing chamber (103), and both through holes are in sealing cooperation with the blocking block (106). It further includes a water cooler (7). The water cooler (7) is fixedly connected to the outer shell (1). Symmetrically distributed water cooling pipes (701) are fixedly connected and communicated with the water cooler (7). The water cooling pipes (701) are embedded in the inner wall of the outer shell (1). First cooling plates (702) which are symmetrically distributed and respectively communicated with the adjacent water cooling pipes (701) are embedded in the inner wall of the outer shell (1). A return pipe (703) which is fixedly connected and communicated with the water cooler (7) is fixedly connected to the first cooling plate (702). The water cooler (7) is communicated with a second cooling plate (704) embedded in the inner wall of the outer shell (1) through a conduit. A first pipe (705) is fixedly connected and communicated with the second cooling plate (704). A second pipe (706) is fixedly connected and communicated with the water cooler (7). The first pipe (705) is communicated with the second pipe (706). The return pipe (703) is provided with a frustum-shaped channel. A limiting plate (707) is slidably connected in the frustum-shaped channel. A sliding rod which is fixedly connected to the limiting plate (707) and slidably connected to the adjacent frustum-shaped channel is provided. An elastic member is fixedly connected between the sliding rod and the frustum-shaped channel. A branch pipe (9) passing through the outer shell (1) is fixedly connected and communicated with the conduit of the water cooler (7). The water cooler (7) is located in the gas storage chamber (102). The branch pipe (9) is communicated with the first cooling plate (702). A rotating plate (901) is rotatably connected in the branch pipe (9). A leaf fan (902) is sealingly rotatably connected at a position close to the rotating plate (901) in the branch pipe (9). A elastic piece (903) is fixedly connected to the leaf fan (902) through a rotating shaft. A limiting rod (904) which is in pressing cooperation with the elastic piece (903) is fixedly connected to the outer shell (1). A sounding housing (905) which is in pressing cooperation with the elastic piece (903) is fixedly connected to the outer shell (1) at a position close to the limiting rod (904). It further includes a pressure relief channel baffle (10). The air box (101) is provided with a pressure relief channel. The pressure relief channel baffle (10) is detachably connected to the position of the air box (101) close to the pressure relief channel. A support frame (1001) is fixedly connected to one side of the air box (101) close to the pressure relief channel baffle (10). An extrusion plate (1002) that is in extrusion fit with the pressure relief channel baffle (10) is slidably connected to the support frame (1001). A first hydraulic telescopic rod (1003) is fixedly connected to the support frame (1001). The telescopic end of the first hydraulic telescopic rod (1003) is fixedly connected to the extrusion plate (1002). A second hydraulic telescopic rod (1004) that is communicated with the first hydraulic telescopic rod (1003) is fixedly connected to the outer shell (1). Hydraulic oil is filled in both the first hydraulic telescopic rod (1003) and the second hydraulic telescopic rod (1004). A rack (1005) is fixedly connected to the telescopic end of the second hydraulic telescopic rod (1004). A gear (1006) is jointly and sealingly rotatably connected between the first pipe (705) and the second pipe (706). The gear (1006) is meshed with the rack (1005). The gear (1006) is provided with a first hole (1007) that is communicated with the first pipe (705). The second pipe (706) is provided with a second hole (1008) that is in communication and cooperation with the first hole (1007).

2. The fully sealed ring main unit based on magnetron environmental protection gas insulation according to claim 1, characterized in that: A sliding plate (2) that is in sealing fit with the air box (101) is slidably connected in the vacuum interrupter (103). An elastic member is fixedly connected between the sliding plate (2) and the air box (101). A heat insulation sleeve (201) is fixedly connected to the air box (101). A piston (202) is sealingly slidably connected in the heat insulation sleeve (201). The piston (202) is made of heat insulation material. A thermal sensitive block (203) is arranged on one side of the heat insulation sleeve (201) close to the air box (101). A heat conducting rod that passes through the thermal sensitive block (203) is fixedly connected to one side of the piston (202) close to the air box (101). A wedge-shaped block (204) is fixedly connected to the heat conducting rod. An elastic member is fixedly connected between the wedge-shaped block (204) and the air box (101). The wedge-shaped block (204) is made of heat conducting material. The wedge-shaped block (204) is in limit fit with the sliding plate (2). A pressure relief chamber (205) is arranged between the sliding plate (2) and the air box (101). An air bag (206) that is communicated with the pressure relief chamber (205) is fixedly connected to the outer shell (1). The air bag (206) is located at the hinge of the ring network cabinet door on the outer shell (1).

3. The fully enclosed ring main unit based on magnetron environmental protection gas insulation according to claim 2, characterized in that: The elastic force of the elastic member on the sliding plate (2) is less than the elastic force of the elastic member on the plugging block (106), so that when the sliding plate (2) and the plugging block (106) are both stressed, the elastic member of the sliding plate (2) is preferentially squeezed and contracted, and the elastic member of the plugging block (106) is prevented from being stretched.

4. A fully sealed ring main unit based on magnetron environmental protection gas insulation according to claim 2, characterized in that: A humidity sensor (4) is installed on the upper side of the outer shell (1). A second magnetic ring (401) electrically connected to the humidity sensor (4) is fixedly connected to the air box (101). An iron block (402) is fixedly connected to one side of the piston (202) close to the second magnetic ring (401). The second magnetic ring (401) is magnetically coupled with the iron block (402). A pneumatic telescopic rod (403) communicating with the heat insulation sleeve (201) is fixedly connected to the air box (101).

5. A fully sealed ring main unit based on magnetron environmental protection gas insulation according to claim 4, characterized in that: A vacuum three-position switch is arranged in the vacuum interrupter (103). An epoxy resin layer is arranged on the inner side wall of the air box (101). The outside of the vacuum three-position switch is fixedly sealed with epoxy resin.

6. A fully sealed ring main unit based on magnetron environmental protection gas insulation according to claim 5, characterized in that: A magnetic control mechanism for controlling the vacuum three-position switch is arranged in the vacuum interrupter (103). The closing current of the magnetic control mechanism is 15 A - 20 A, the opening current is less than 1 A, the opening time of the magnetic control mechanism is less than 6 ms, the closing time is less than 10 ms, and the discreteness of closing and opening is less than ±0.2 ms.

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